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Microstructure and texture optimization by static recrystallization originating from {10-12} extension twins in a Mg-Gd-Y alloy
Lu, S. H.1,2; Wu, D.1; Chen, R. S.1; Han, En-hou1
Corresponding AuthorWu, D.(dwu@imr.ac.cn) ; Chen, R. S.(rschen@imr.ac.cn)
2020-12-15
Source PublicationJOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN1005-0302
Volume59Pages:44-60
AbstractDuring the deformation of Mg alloys, {10-12} extension twin often contributes to the formation of basal texture but rarely assists the nucleation of recrystallization, i.e., effective grain refinement, therefore it seems to make against the improvement of formability and mechanical properties. In this work, {10-12} extension twin has been creatively utilized as a preference nucleation site for static recrystallization (SRX), achieving grain refinement and orientation randomization in a Mg-Gd-Y alloy using multi-directional impact forging (MDIF) and subsequent annealing treatment. Effect of {10-12} extension twin on SRX behavior has been investigated by annealing treatment at 450 degrees C using quasi-in-situ optical microscopy (OM) and quasi-in-situ electron back-scattering diffraction (EBSD). The microstructural evolution during annealing shows that several SRX gains can nucleate from the grain boundary of untwinned grains, but they only have few influences on the final microstructure due to their limited volume faction and sluggish growth. In contrast, a large number of SRX gains can initiate from {10-12} extension twin and grow up without the confine of twin boundaries. Finally, they consume their parent grains and make the main contribution to grain refinement. This should be attributed to those pinned {10-12} twin boundary, by interacting with various dislocation slips during the MDIF process, which can operate like grain boundary, store enough strain energy, and promote the nucleation of SRX during annealing. On the other hand, SRX grains usually keep initial random orientation and further randomize the forging texture during annealing treatment. (C) 2020 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
KeywordMg-Gd-Y alloy Multi-directional impact forging (MDIF) {10-12} extension twin Quasi-in-situ electron back-scattering diffraction (EBSD) Static recrystallization (SRX)
Funding OrganizationNational Key Research and Development Program of China ; National Natural Science Foundation of China ; National Science and Technology Major Project of China ; Natural Science Foundation of Liaoning province
DOI10.1016/j.jmst.2020.04.040
Indexed BySCI
Language英语
Funding ProjectNational Key Research and Development Program of China[2016YFB0301104] ; National Natural Science Foundation of China[51531002] ; National Natural Science Foundation of China[51301173] ; National Natural Science Foundation of China[51601193] ; National Natural Science Foundation of China[51701218] ; National Science and Technology Major Project of China[2017ZX04014001] ; Natural Science Foundation of Liaoning province[20180550799]
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000588638600005
PublisherJOURNAL MATER SCI TECHNOL
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/141263
Collection中国科学院金属研究所
Corresponding AuthorWu, D.; Chen, R. S.
Affiliation1.Chinese Acad Sci, Inst Met Res, Grp Magnesium Alloys & Their Applicat, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Lu, S. H.,Wu, D.,Chen, R. S.,et al. Microstructure and texture optimization by static recrystallization originating from {10-12} extension twins in a Mg-Gd-Y alloy[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2020,59:44-60.
APA Lu, S. H.,Wu, D.,Chen, R. S.,&Han, En-hou.(2020).Microstructure and texture optimization by static recrystallization originating from {10-12} extension twins in a Mg-Gd-Y alloy.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,59,44-60.
MLA Lu, S. H.,et al."Microstructure and texture optimization by static recrystallization originating from {10-12} extension twins in a Mg-Gd-Y alloy".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 59(2020):44-60.
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